DE112015001056B4 - vacuum pump - Google Patents

Abstract

The present invention relates to a vacuum pump and, more particularly, to a vacuum pump designed to change the direction of a suction port formed on a wall of a housing as needed. The vacuum pump includes: a housing; an ejector part embedded in the housing; and a pressure applying means provided on the outside of the housing. More specifically, the housing includes two or more parts, including a main part having the suction port, which are arranged in a line, wherein a locking element is formed along a contact surface between them. This structure allows the main body to rotate, and thus the direction of the suction port can be changed.

Description

Field of engineering

The present invention relates generally to a vacuum pump for use in a vacuum transfer system. More specifically, the present invention relates to a vacuum pump configured to change the direction of a suction port formed on a side wall of a housing as needed.

General state of the art

A vacuum transfer system refers to a system where a vacuum pump is operated by high-speed compressed air to discharge air from an interior of a suction cup or a suction pad, and an object is gripped using a negative pressure and transferred to a predetermined position while the air is discharged. More particularly, the present invention relates to a vacuum pump that is part of the vacuum transfer system.

As shown in 1 and 2 includes a conventional vacuum pump 1 a hollow case 2 located at a first end with an inlet opening 3 and at a second end with a discharge opening 4 is provided and in between with a suction port 5 is provided; and a multi-stage ejector 6 inside the case 2 mounted in series. The vacuum transfer system is designed so that the vacuum pump 1 is attached to a device by means such as a holder, which the housing 2 carries, and the vacuum pump, together with a suction cup 7 with the ejector 6 communicates, in that they are with the suction port 5 is connected, and with a robotic arm, with the suction cup 7 connected is.

The compressed air becomes the suction port 3 delivered, flows through the ejector at high speed 6 and then goes through the drain hole 4 delivered to the outside. Here is the air inside the sucker 7 into the ejector 6 introduced and is discharged together with the compressed air. In the drainage process described above, in the interior of the suction cup 7 generates a vacuum and a negative pressure, and the vacuum transfer system grips an object and transfers it to a predetermined position using the negative pressure.

The vacuum pump shown in the drawings 1 is disclosed by the Korean Utility Model KR 20 0 274 370 Y1 However, it does not differ in its basic design and operation from a vacuum pump that is covered by the Korean patents KR 101 029 967 B1 . KR 10 1 039 470 B1 . KR 10 1 066 212 B1 and KR 10 1 351 768 B1 or from the Japanese patent application JP H05 240 198 A is disclosed. The vacuum pump 1 Although used to form the on-site vacuum transfer system, the vacuum pump has the following problems.

First, it is not possible to change direction for each opening. For example, it is in the state where the vacuum pump 1 is attached to the device and attached, generally not necessary, the direction of the inlet opening 3 and the drain hole 4 to change. However, the direction of the intake port must be 5 are changed frequently depending on where an object and a transfer location are located. The conventional vacuum pump 1 may not be efficient on the need for a change in direction of the intake 5 adjustable.

Second, it is not possible an overall length of the case 2 to change. For example, as in the Korean patent, for example KR 101 351 768 B1 in the case where only a cylindrical ejector is mounted within the housing, an overall length of the housing 2 be adapted according to a cartridge to be used. The conventional vacuum pump 1 however, structurally may not be able to accommodate the need for length adjustment.

Third, a complex mounting arrangement is needed to the conventional vacuum pump 1 to manufacture. The complexity occurs when installing the ejector 6 and when assembling the housing 2 everywhere, and therefore the assembly / disassembly is the vacuum pump 1 difficult and productivity is reduced.

epiphany

Technical problem

Thus, the present invention has been made in view of the above-mentioned problems occurring in the prior art, and the present invention is intended to propose a vacuum pump designed to change a direction of openings, more specifically a direction of a suction port, as needed. The present invention is also to propose a vacuum pump which is designed so that elements constituting the vacuum pump can be easily assembled / disassembled.

Technical solution

In order to achieve the stated object, according to one aspect of the present invention, a A vacuum pump is provided, comprising: a housing, which is provided by linearly arranging at least two parts and comprising: a hollow main part with a compressed air inlet opening, a drain opening, a suction opening and a vacuum chamber, which communicates with the suction port, which is connected to a first end, a second end, on a side wall of the main part or in the main part are provided, wherein between the main part and adjacent parts a plurality of latching elements along contact surfaces are provided, wherein the main part is rotated with respect to the adjacent parts, and thus a direction of the suction port will be changed; an ejector part having a cylindrical ejector main body mounted inside the housing, the ejector main body including: an inlet provided at a first end thereof and communicating with the inlet port; an outlet provided at a second end thereof and connected to the discharge port; and a through hole provided on a side wall thereof and communicating with the suction port via the vacuum chamber; and means to provide cohesion between the parts.

The locking elements may have a corresponding structure of projection groove or rotatable sawtooth.

The ejector part may further include a first support body and a second support body, which are respectively mounted on opposite ends of the ejector main body and which are configured such that their outer peripheries come into contact with an inner periphery of the housing, the first and second support bodies being so configured are that they do not interfere with the connection between the individual openings and the Ejektorhauptkörper.

Preferably, the vacuum pump of the present invention further comprises: pressure applying means provided on opposite sides of the housing to provide cohesion between the parts. More specifically, the pressure applying means may include: a plate that comes in contact with each of the side surfaces of the housing; and a pressure applying ring that firmly presses the plate and the parts by being inserted into one end of the ejector part that has passed through a mounting hole of the plate.

Preferably, the plate is a holder for fixing the vacuum pump.

Advantageous effects

According to a vacuum pump of the present invention having the above-described characteristics, the housing is provided by arranging at least two parts linearly, the main part being rotatable with respect to the adjacent parts. Therefore, the vacuum pump of the present invention is advantageous in that: a direction of the suction port can be changed as needed; the housing and the elements that make up the vacuum pump can be connected by inserting or inserting them, whereby the vacuum pump can be easily assembled / disassembled without additional tools; and depending on the construction, it is possible to appropriately select a size of the housing according to a size of the ejector part embedded in the housing.

list of figures

• 1 is an external view of a conventional vacuum pump;
• 2 is a sectional view of 1 ;
• 3 Fig. 11 is an external view of a vacuum pump according to the present invention;
• 4 is a sectional view taken along a line AA from 3 ;
• 5 is a sectional view taken along a line BB from 3 ;
• 6 is an exploded view illustrating the housing of 3 ;
• 7 is a sectional view showing an ejector of 4 ;
• 8th is an exploded view of 7 ; and
• 9 and 10 are views based on 4 and 5 and FIG. 10 illustrates an operation of the vacuum pump according to the present invention.

Best execution

Detailed features and advantages of a vacuum pump of the present invention capable of directional change (hereinafter referred to as a vacuum pump) will become apparent from the following detailed description based on the accompanying drawings. The vacuum pump according to the present invention is designated by the reference numeral 100 in 3 to 10 ,

As shown in 3 to 8th includes the vacuum pump 100 according to the present invention: a hollow housing 110 ; one ejector 120 that in the case 110 is embedded; and a pressure applying device 140 on the outside of the case 110 is provided.

The housing 110 is a hollow organ that has a compressed air inlet 111 , a drain opening 112 and a suction port 113 is provided at a first end, a second end or a side wall thereof and in which a vacuum chamber C is formed, with the suction port 113 communicates. Preferably, the housing further includes a vacuum tapping opening 114 that with the vacuum chamber C communicates. In the present invention, at least two cylindrical parts 115 . 116 and 117 that is a major part 115 Include the suction port 113 has, arranged in a line to the housing 110 to build.

In one embodiment of the present invention, three parts form 115 . 116 and 117 that the main part 115 which is located in the middle, and adjacent parts 116 and 117 , which are respectively disposed on opposite sides of the main part, include a housing 110 , Of course, in another embodiment, at least two or four parts may be the housing 110 form, and in that it is provided with short parts, the length of the housing 110 be adjusted as needed, for example, according to a length of the Ejektorteils 120 to be embedded in it.

Further, in the embodiment of the present invention, the inlet port is 111 in a first adjacent part 116 provided, is the suction port 113 in the main part 115 provided and is the drain opening 112 in a second adjacent part 117 intended. Further, the suction port 113 on each surface of the main body 115 provided in various forms and in plural. Here is none of the places where the openings 111 . 112 and 113 located on the respective parts described above 115 . 116 and 117 limited. Furthermore, each of the parts 115 . 116 and 117 at least two types of openings 111 . 112 and 113 exhibit.

In the drawings, the reference numerals denote 113a and 112a a suction port and a discharge port, respectively at opposite ends of the ejector part 120 are provided.

Between the main part 115 and the neighboring parts 116 and 117 are several locking elements 118a and 118b along contact surfaces S1 and S2 intended. In the drawings, a corresponding structure of projection-groove as an example of the locking elements 118a and 118b shown, but this is not a restriction. The locking elements may have a corresponding structure of a rotatable sawtooth, and if necessary, various modifications are possible.

The number of locking elements 118a and 118b and the places where they are located have the outer shape of the main part 115 to do. When the main part is quadrangular as shown in the drawings, there are four locking elements 118a and 118b are provided on respective surfaces so as to correspond to each other and each have the same shape. This can be the main part 115 in a selected direction with the adjacent parts 116 and 117 be connected while it is relative to the adjacent parts 116 and 117 turns (see R from 6 ), and in the embodiment of the present invention, a direction of the suction port 113 be selected from four different directions as needed.

In practice, the housing 110 in the vacuum transfer system with several flexible hoses connected to each suction port 113 and to connect the suction cup with it. Here, according to the directions of the suction port 113 , a vacuum cup or an object, the tubing is twisted or twisted. In case of twisting or entangling is the suction port 113 to the advantage that their direction can be changed as needed.

The ejector part 120 includes: an ejector main body 121 inside the case 110 is mounted, more precisely, at the vacuum chamber C is mounted in the longitudinal direction; and carrier body 124 and 125 , the opposite ends of the Ejektorhauptkörpers 121 inside the case 110 wear. Here is the main body 121 a cylindrical ejector comprising: an inlet 122a which is provided at its first end and the one with the compressed air inlet opening 111 of the housing 110 communicates; an outlet 122b which is provided at its second end and which is provided with the discharge opening 112 communicates; and a continuous opening 123 provided on a side wall thereof and via the vacuum chamber with the suction port 113 communicates.

The ejector main body 121 that is configured as described above has a good mountability, and thereby the ejector main body can be designed to be within the housing 110 can be mounted without additional support means. In the embodiment of the present invention, the ejector member 120 but furthermore a first carrier body 124 and a second carrier body 125 each at opposite ends of the ejector main body 121 are mounted and which are designed so that their outer peripheries with an inner circumference of the housing 110 in Come in contact, leaving the vacuum chamber C inside the case 110 can be formed and the ejector main body 121 Stability can be conferred. It is preferred that the first and the second carrier body 124 and 125 are designed so that they are the connection between the individual openings 111 . 112 . 112a . 113 . 113a and 114 and the ejector main body 121 do not bother.

The first carrier body 124 indicates: a supply line 126 leading to the inlet opening 111 runs, with one end of the inlet 122a of the ejector main body 121 is introduced therein; and an annular projecting portion 127 coming out of the case 110 protrudes outwards. Preferably, the first carrier body 124 furthermore a vacuum breaker line 128a on, from the vacuum breaker opening 114 in the housing 110 is provided, to the vacuum chamber C runs.

In the embodiment of the present invention, the above section is 127 designed so that its inner circumference as a suction port 113a is used. To achieve this, the first carrier body 124 a way 129 up, from the intake 113a to the vacuum chamber C runs, and furthermore has a Vakuumabreißleitung 128b on, from the vacuum breaker opening 114 to the intake 113a that is, to the inner periphery of the protruding portion 127 runs. As shown in the drawings, the suction port is 113a of the previous section 127 with a filter F provided for filtering intake air. Here is the Vakuumabreißleitung 128b designed so that they are relative to a rear surface of the filter F tilted, the slope being the speed and pressure of the compressed air leading to the vacuum extraction opening 114 delivered, does not weaken.

The second carrier body 125 indicates: a drain line 130 leading to the drain opening 112 runs, with one end of the outlet 122b of the ejector main body 121 is introduced therein; and an annular projecting portion 131 coming out of the case 110 protrudes outwards. In the embodiment of the present invention, the above section is 131 of the second carrier body 125 designed so that its inner circumference as a drain opening 112a will be used.

In the drawings, both are the first carrier body 124 as well as the second carrier body 125 into an inner body containing the ejector main body 121 directly carries, and the preceding section 127 . 131 divided, and the inner body and the protruding portion are by means of U -shaped Klammem 132 , which are provided on outer surfaces of the body, joined together. Thus, elements that make up the ejector main body 121 and the carrier bodies 124 and 125 be assembled in a simple way. Of course, the design may be one body only, or it may be modified to other shapes depending on the design. The reference number 133 denotes a latching element in the carrier bodies 124 and 125 is provided, wherein the locking element both in the first carrier body 124 as well as in the second carrier body 125 is designed to prevent the ejector 120 unintentionally turns, and that of a feather groove 119 corresponds to that in each of the adjacent parts 116 and 117 is formed on opposite sides of the housing 110 are arranged.

The vacuum pump 100 The present invention comprises means for ensuring cohesion between the parts 115 . 116 and 117 of the housing 110 to care. The locking elements 118a and 118b may be used as a means to provide cohesion through proper modification, and accordingly, in this case, additional design for the device need not be required. In the embodiment of the present invention, the means providing cohesion are as follows: a snap ring 146 that extends beyond the outer perimeter of the protruding section 131 of the ejector part 120 fit that to one end of the case 110 projecting; and a pressure applying device 140 attached to at least one of opposite sides of the housing 110 is provided. The following details the pressure application device 140 the establishment referred to, which ensures a cohesion.

The pressure application device 140 is on at least one of opposite sides of the housing 110 provided and and ensures a cohesion between adjacent parts 115 . 116 and 117 , More specifically, the pressure applying means comprises: a plate 141 Connected to each of the side surfaces of the case 110 comes into contact; and a pressure exercise ring 143 who the plate 141 and the parts 115 . 116 and 117 firmly presses on each other by introducing into one end of the Ejektorteils 120 through a mounting hole 142 the plate 141 has been passed.

The reference number 144 refers to insertion holes or grooves on a surface of the plate 141 are formed to the housing 110 firmly attach, since they have lateral projections of the adjacent parts 116 and 117 correspond. The holes 144 are several times along an outer edge of the mounting hole 142 formed, and thereby are the adjacent parts 116 and 117 in terms of the plate 141 rotatable to change their directions. This structure makes a change in the directions of the suction port 111 and the drain hole 112 of the housing 110 possible.

The reference number 145 denotes inner protrusions of the mounting hole 142 to prevent the ejector part 120 undesirably rotates, in that they detent grooves 127a and 131 corresponding to an outer circumferential surface of the protruding portion 131 of the ejector part 120 are formed. Preferably, the plate 141 used as a holder to the vacuum pump 100 to attach, and the pressure-exerting ring 143 is a nut that extends beyond the outer perimeter of each of the protruding sections 127 and 131 is set.

The vacuum pump 100 of the present invention as described above, in cooperation with a Druckluftzuführvorrichtung, via a solenoid valve selectively with the inlet opening 111 and the vacuum extraction opening 114 connected to a suction cup using a long hose with the individual suction ports 113 connected, a robot arm, which is connected to the suction cup, and the like part of a vacuum transfer system. Furthermore, the vacuum pump is used 100 to create or break a vacuum and a negative pressure in response to a supply direction of the compressed air.

Hereinafter, reference will be made to a process of performing generation or demolition of a vacuum and a negative pressure with reference to FIG 4 . 5 . 9 and 10 ,

First, the compressed air to the inlet opening 111 delivered, then at high speed through the feed line 126 and the drainage line 130 is guided and passes through the drain holes 112 and 112a discharged to the outside (see arrow ①). In this case, the air flows inside the vacuum cup successively through the suction openings 113 and 113a , the vacuum chamber C and the through openings 123 , then becomes the ejector main body 121 is introduced and is together with the compressed air through the drain holes 112 and 112a discharged to the outside (see arrow ②).

In the process described above vacuum and negative pressure in the vacuum chamber C and generated in the suction cup, and it is possible to grip an object using the generated negative pressure. Further, the robot arm is operated to transfer the object to a predetermined location. Depending on the places where the suction opening 113 , the vacuum cup, the object or the like can be hoses, which the suction port 113 and connect, bend, fold or devour the suction cup. In this case, by slightly loosening the pressure-exerting ring 143 the direction of the intake 113 be selected while the main body 115 is turned. According to a corresponding type of locking elements 118a and 118b is it possible to change the direction of the intake 113 by selecting a rotation of the main part 115 is enforced without the pressure-exerting ring 143 to relax.

After the object has been transferred, then the compressed air quickly to the Vakuumabreißöffnung 114 delivered to quickly separate the suction cup from the object. The compressed air (see arrow ③), which leads to the vacuum tear-off opening 114 is supplied, flows through the vacuum taps 128a and 128b and then over the vacuum chamber C or directly to the intake openings 113 and 113a delivered (see arrows ③-1 and ③-2). As a result, the generated vacuum and the negative pressure generated break off and the vacuum cup is separated from the object.

In particular, the compressed air used by the Vakuumabreißleitung 128b has flown, to, foreign matter on the back surface of the filter F Remove by pushing against the rear surface of the filter when it flows through it.

LIST OF REFERENCE NUMBERS

111:

inlet port

112, 112a:

drain hole

113, 113a:

suction

114:

Vakuumabreißöffnung

115:

Bulk

116, 117:

adjacent part

118a, 118b:

locking element

119:

Fedemut

120:

ejector

121:

main body

122a:

inlet

122b:

outlet

123:

through opening

124, 125:

support body

126:

feed

127:

previous section

128a, 128b:

Vakuumabreißleitung

129

path

130:

drain line

131:

previous section

132:

clinch

133:

locking element

140:

Pushing means

141:

plate

142:

mounting hole

143:

pressure-exerting ring

144:

Insertion holes, grooves

145:

projections

146:

snap ring

C:

vacuum chamber

F:

filter

S1, S2:

contact surface

Claims (13)

Vacuum pump, comprising: a housing (110) which is provided by linearly arranging at least two parts (115, 116, 117), wherein the at least two parts (115, 116, 117) include a hollow main part (115), wherein the housing (110) a compressed air inlet opening (111), a discharge opening (112), a suction opening (113) and a vacuum chamber (C) is formed, wherein the vacuum chamber (C) with the suction port (113) communicating at a first end of the housing ( 110), on a second end of the housing (110) or on a side wall of the main part (115) or in the main part (115) is provided, wherein between the main part (115) and the adjacent parts (116, 117) a plurality of latching elements (118a, 118b) are provided along contact surfaces (S1, S2), the main part (115) being rotated with respect to the adjacent parts (116, 117), and accordingly, a direction of the suction port (113) being changed; an ejector member (120) having a cylindrical ejector main body (121) mounted within the housing (110), the ejector main body comprising: an inlet (122a) provided at a first end of the ejector main body (121) and communicating with the inlet port (111); an outlet (122b) provided at a second end of the ejector main body (121) and communicating with the discharge port (112); and a through hole (123) provided on a side wall of the ejector main body (121) and communicating with the suction port (113) via the vacuum chamber (C); and means for providing cohesion between the parts (115, 116, 117). Vacuum pump after Claim 1 , wherein the latching elements (118a, 118b) have a corresponding structure of projection-groove. Vacuum pump after Claim 1 wherein the housing (110) further includes a vacuum tapping opening (114) communicating with the vacuum chamber (C). Vacuum pump after Claim 1 wherein the ejector member (120) further comprises a first support body (124) and a second support body (125), which are respectively mounted on opposite ends of the ejector main body (121) and which are configured so that their outer peripheries are connected to an inner periphery of the housing (110), wherein the first and second support bodies are designed so as not to interfere with the connection between the individual openings (111, 112, 113) and the ejector main body (121). Vacuum pump after Claim 4 wherein the first support body (124) comprises: a supply duct (126) extending to the inlet port (111), one end of the inlet (122a) of the ejector main body (121) being inserted into the supply duct; and a vacuum breakaway conduit (128a) extending from a vacuum breakaway port (114) provided in the housing (110) to the vacuum chamber (C). Vacuum pump after Claim 4 wherein the second carrier body (125) has a discharge conduit (130) extending to the discharge ports (112, 112a), one end of the outlet (122b) of the ejector main body (121) being inserted there. Vacuum pump according to one of Claims 4 to 6 wherein the first support body (124) or the second support body (125) is configured to be divided into an inner body directly supporting the ejector main body (121) and a protruding portion (127, 131), and the inner one Body and the protruding portion by U-shaped brackets (132) which are provided on their outer surfaces, joined together. Vacuum pump after Claim 1 further comprising: pressure applying means (140) as means for providing cohesion provided on at least one of opposite sides of the housing (110) to provide cohesion between the parts (115, 116, 117). Vacuum pump after Claim 8 wherein the pressure applying means (140) is a snap ring (146) whereby the axial fixation between the ejector member (120) and the housing (110) is achievable, the snap ring (146) being formed over an outer periphery of an outer protruding portion (131). the ejector part (120) is fitted, the outer protruding part (131) of the Ejector (120) protrudes toward one end of the housing (110). Vacuum pump after Claim 8 wherein the pressure applying means (140) comprises: a plate (141) contacting each of the side surfaces of the housing (110); and a pressure applying ring (143) which firmly presses the plate (141) and the parts (115, 116, 117) together by pressing on one end of the ejector part (120) or on the protruding part (127, 131) passing through Mounting hole (142) of the plate (141) has been passed, is attached. Vacuum pump after Claim 10 wherein the plate (141) is a holder for securing the vacuum pump (100). Vacuum pump after Claim 10 wherein the plate (141) for securing the housing (110) has insertion holes or insertion grooves (144) corresponding to the lateral projections of the adjacent parts (116, 117). Vacuum pump after Claim 12 wherein the insertion holes or insertion grooves (144) are formed multiple times along an outer edge of the mounting hole (142) so that the adjacent parts (116, 117) are rotatable with respect to the plate (141) to change their directions.

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